Smoke from Canadian wildfires has impacted the air quality throughout United States, including in the northern High Plains, Midwest, Great Lakes, southern Mid-Atlantic and into the Northeast. This has ...

How do you find the quality of the light a light bulb produces? Using the color rendering index, a measure of how well a light bulb illuminates a range of colors. Appliance Science looks at the ...

This week, millions of Americans are anxiously scanning air quality maps focusing on two colors: red and purple. Red indicates "unhealthy" air quality, and purple? "Very unhealthy." When did purple ...

Q: Just as I understand the concept of color temperature (Kelvin), now CRI is being bandied about as LEDs come into the market. What is it exactly? A: I am right there with you. From the beginning of ...

When most people hear the phrase “adequate lighting” in an industrial setting, they immediately think about brightness and the level of visibility. Certainly, that’s important for employee safety.

The index rates how clean or polluted the air is each day. The EPA uses this measure to keep tabs on five kinds of air pollutants. The main concern from the wildfire smoke is fine particle pollution, ...

Those affected by wildfire smoke focus on the colors red, purple and maroon on the air quality charts. Red used to be the scariest color. Why did that change?(Story aired on ATC on June 28, 2023.) ...

DyStar Group, a leading provider of dyes, performance chemicals and color solutions for the textile industry, is nixing its oft-used Color Index in an effort to improve its ecological differentiation.